Support parsing date refs

2 files changed, 62 insertions, 3 deletions

diff --git a/_pytest/test_unfurl.py b/_pytest/test_unfurl.py
index 9523bc6..3545332 100644
--- a/_pytest/test_unfurl.py
+++ b/_pytest/test_unfurl.py
@@ -1,7 +1,8 @@
 from __future__ import print_function, unicode_literals
 
-import wee_slack
+from datetime import datetime, timedelta
 import pytest
+import wee_slack
 
 
 @pytest.mark.parametrize('case', (
@@ -103,8 +104,35 @@ import pytest
         'output': "@othersubteam This is announcement for the dev team"
     },
     {
-        'input': "Ends <!date^1584573568^{date_short} at {time}|Mar 18, 2020 at 23:19 PM>.",
-        'output': "Ends Mar 18, 2020 at 23:19 PM."
+        'input': "Ends <!date^1584573568^{date_num} - {date} - {date_short} - {date_long} at {time} - {time_secs}|Mar 18, 2020 at 23:19 PM>.",
+        'output': "Ends 2020-03-19 - March 19, 2020 - Mar 19, 2020 - Thursday, March 19, 2020 at 00:19 - 00:19:28."
+    },
+    {
+        'input': "Ends <!date^1584573568^{date_num} {invalid_token}>.",
+        'output': "Ends 2020-03-19 {invalid_token}."
+    },
+    {
+        'input': "Ends <!date^1584573568^{date_num}^http://github.com>.",
+        'output': "Ends 2020-03-19 (http://github.com)."
+    },
+    {
+        'input': "Ends <!date^{}^{{date_pretty}} - {{date_short_pretty}} - {{date_long_pretty}}>.".format(
+            int((datetime.today()).timestamp())),
+        'output': "Ends today - today - today."
+    },
+    {
+        'input': "Ends <!date^{}^{{date_pretty}} - {{date_short_pretty}} - {{date_long_pretty}}>.".format(
+            int((datetime.today() - timedelta(days=1)).timestamp())),
+        'output': "Ends yesterday - yesterday - yesterday."
+    },
+    {
+        'input': "Ends <!date^{}^{{date_pretty}} - {{date_short_pretty}} - {{date_long_pretty}}>.".format(
+            int((datetime.today() + timedelta(days=1)).timestamp())),
+        'output': "Ends tomorrow - tomorrow - tomorrow."
+    },
+    {
+        'input': "Ends <!date^1577833200^{date_pretty} - {date_short_pretty} - {date_long_pretty}>.",
+        'output': "Ends January 01, 2020 - Jan 01, 2020 - Wednesday, January 01, 2020."
     }
 ))
 def test_unfurl_refs(case, realish_eventrouter):
diff --git a/wee_slack.py b/wee_slack.py
index 9370740..338c23a 100644
--- a/wee_slack.py
+++ b/wee_slack.py
@@ -6,6 +6,7 @@
 from __future__ import print_function, unicode_literals
 
 from collections import OrderedDict
+from datetime import date, datetime, timedelta
 from functools import wraps
 from io import StringIO
 from itertools import chain, count, islice
@@ -3562,6 +3563,36 @@ def resolve_ref(ref):
             subteam = team.subteams.get(subteam_id)
             if subteam:
                 return subteam.handle
+        elif ref.startswith("!date"):
+            parts = ref.split('^')
+            ref_datetime = datetime.fromtimestamp(int(parts[1]))
+            link_suffix = ' ({})'.format(parts[3]) if len(parts) > 3 else ''
+            token_to_format = {
+                    'date_num': '%Y-%m-%d',
+                    'date': '%B %d, %Y',
+                    'date_short': '%b %d, %Y',
+                    'date_long': '%A, %B %d, %Y',
+                    'time': '%H:%M',
+                    'time_secs': '%H:%M:%S'
+            }
+
+            def replace_token(match):
+                token = match.group(1)
+                if token.startswith('date_') and token.endswith('_pretty'):
+                    if ref_datetime.date() == date.today():
+                        return 'today'
+                    elif ref_datetime.date() == date.today() - timedelta(days=1):
+                        return 'yesterday'
+                    elif ref_datetime.date() == date.today() + timedelta(days=1):
+                        return 'tomorrow'
+                    else:
+                        token = token.replace('_pretty', '')
+                if token in token_to_format:
+                    return ref_datetime.strftime(token_to_format[token])
+                else:
+                    return match.group(0)
+
+            return re.sub(r"{([^}]+)}", replace_token, parts[2]) + link_suffix
 
     # Something else, just return as-is
     return ref